Without going into too much detail, for over 30 years the MBR has been the hard drive partition standard, which has a 2TB limit. GPT replaces MBR with one of it’s key benefits, exceeding the 2TB limit. While the fdisk tool is dated, there are several other tools that handle 2TB drives and beyond. gdisk One such tool, is gdisk,…
Read More »While testing a client connection to a Katello server, the client returns an error when any yum command is issued. The error is quite visible with [Errno 14] PYCURL ERROR 22 – “The requested URL returned error: 403 Forbidden”, however, it is not quite clear. While the environments will likely vary, this is the environment used for this test. Environment…
Read More »If yum updates or yum anything provides a network error or if you simply want to unregister the system from a managed server like RHN Classic, Red Hat Satellite, Katello, or Spacewalk, there is a only one file in the way. If presented with an error similar to this: yum repolist Loaded plugins: fastestmirror, refresh-packagekit, rhnplugin, security Network error: unknown…
Read More »A method to increase the yum download speed is to install the yum-plugin-fastestmirror yum plugin. While this in itself increases the download speeds and decreases the download times, there is yet another plugin to be added. An article titled, Turbo Charge Yum with Fastest Mirror and AxelGet Plugins, provided the foundation for this script to simplify the installation and configuration…
Read More »Atlassian JIRA is a bug and issue tracker. Atlassian JIRA lets you priorities, assign, track, report and audit issues from software bugs, helpdesk tickets, project tasks to change requests. On a CentOS 6.5 Linux install, an instance of JIRA was installed. Upon completion, a service to automate the start, stop, restart, and status needed to be created manually. One of…
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In an existing environment with Atlassian Confluence is installed, the likelihood of maintaining version updates as often as they should become available is generally unlikely. As these updates come to pass so does the diminishing possibility that an exported space from one installation may be imported into another installation. A case for importing spaces between installations would be for maintaining…
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VirtualBox will not start and present a Critical Error dialog box which reads “Failed to create the VirtualBox COM object. The application will now terminate.” If you select Details for additional information, it may offer something similar to this error, if not the same, Callee RC: CO_E_SERVER_EXEC_FAILURE (0x80080005). Here is a solution that worked in this case and will get…
Read More »Knowing the UUID (“Universally Unique Identifier”) of a device is important in the event of creating a permanent mount point using /etc/fstab. Of course, the name of the device may be used, however, using the UUID is the current trend. There are benefits to this trend. The identifier will likely not be used by anything else so that there will…
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The yum grouplist command can identify available package groups from the configured repositories. However, through a terminal window, the list is considerable when the language support is factored into the equation. For a Linux CentOS 6.4 x86_64 install, there are 206 package groups. Here are a few commands that may help. To determine the number of package groups that exist….
Read More »While there are many resources dedicated to this very configuration, it was difficult to make any one of them work. The current configuration is CentOS 6.5. Here is the script to get a fully-functional sFTP server with chroot using the /home directories. #!/bin/bash # Description: Configure an sFTP server with chroot ####################################################### # Install OpenSSH (“should already be installed”) #######################################################…
Read More »There are several commands that may be used to list the partitions of a Linux computer. Likely the most common one is the fdisk command. While it fdisk command is capable of just about anything, I am not always in the need to see all the information that listing the partitions provides, particularly when there are many partitions. So, I…
Read More »An example of a configuration file with many commented lines is /etc/sysctl.conf. If you wanted to display the contents of the file without the commented lines, the following command may be issued. grep -v ‘^#’ /etc/sysctl.conf However the resulting contents will be displayed with the remaining blank lines. To get around this one of a couple of commands may be…
Read More » Running Oracle’s VirtualBox on a Microsoft Windows 7 desktop to test applications and operating systems has proven to be very productive. As a result of a VPN connection using Citrix, a VirtualBox VM of CentOS 6.5 Linux could not connect to the remote network. After combing through the Internet, a solution is born. I know that there are many variables…
Read More »While perusing through the Internet, I found this site called iF !1 0 “If Not True then False“. I found this write-up on how to install Adobe Reader on one of many different flavors on Linux. I couldn’t pass up on this, since I was in the hunt for Adobe Reader. The process worked great, so here is my slight…
Read More »This should be easy, install Adobe Flash on a Linux operating system to watch Youtube videos in Firefox. After an hour or so fighting with Adobe Flash, through every method I could find on the Internet, I finally found one that worked, the first time! There are many who write of downloading a compressed file and extracting the needed file…
Read More »It was discovered days later that one of my websites was offline displaying only 500 error messages. As it turned out, it was as a result of the .htaccess files. The .htaccess files did not include <IfModule XXXXX> </IfModule> around the directives. Tracking down the offending lines, it was determined that the lines were all part of the mod_headers.c module….
Read More »After searching through several guides, all complete in one way or another, however, not complete enough, I put the pieces together into this guide. This particular configuration is a basic VNC server with two users. After creating the second user, the process can be repeated for additional users. Install the VNC Server yum install tigervnc-server -y Edit the /etc/sysconfig/vncservers file….
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